U.S. patent application number 16/779435 was filed with the patent office on 2020-09-03 for grommet and wire harness.
The applicant listed for this patent is Yazaki Corporation. Invention is credited to Masaru Kiuchi, Takeshi Onoda.
Application Number | 20200276943 16/779435 |
Document ID | / |
Family ID | 1000004656735 |
Filed Date | 2020-09-03 |
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United States Patent
Application |
20200276943 |
Kind Code |
A1 |
Kiuchi; Masaru ; et
al. |
September 3, 2020 |
GROMMET AND WIRE HARNESS
Abstract
A grommet includes: a main body part fitted to a penetration
hole penetrating an attachment panel along an axial direction,
stops water at the penetration hole, and has a wiring material
inserted thereinto along the axial direction; and a tubular part
unified with the main body part so as to have a tubular shape, and
has the wiring material inserted thereinto. The tubular part
includes a halved part formed to have a shape of a part of the
tubular part in a circumferential direction, an open part where an
inside of the tubular part is open at a position except a position
where the halved part is formed in the circumferential direction,
and an open/close part formed continuing from the halved part and
is able to open and close the open part.
Inventors: |
Kiuchi; Masaru; (Shizuoka,
JP) ; Onoda; Takeshi; (Shizuoka, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Yazaki Corporation |
Tokyo |
|
JP |
|
|
Family ID: |
1000004656735 |
Appl. No.: |
16/779435 |
Filed: |
January 31, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01B 17/58 20130101;
B60R 16/0222 20130101 |
International
Class: |
B60R 16/02 20060101
B60R016/02; H01B 17/58 20060101 H01B017/58 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 28, 2019 |
JP |
2019-035043 |
Claims
1. A grommet comprising: a main body part that is fitted to a
penetration hole penetrating an attachment target along an axial
direction, stops water at the penetration hole, and has a wiring
material inserted thereinto along the axial direction; and a
tubular part that is unified with the main body part so as to have
a tubular shape, and has the wiring material inserted thereinto
along the axial direction, wherein the tubular part includes: a
halved part that is formed to have a shape of a part of the tubular
part in a circumferential direction; an open part where an inside
of the tubular part is open at a position except a position where
the halved part is formed in the circumferential direction; and an
open/close part that is formed continuing from the halved part in
the circumferential direction and is able to open and close the
open part.
2. The grommet according to claim 1, wherein the open/close part is
formed to have a halved shape corresponding to the open part.
3. The grommet according to claim 1, wherein the open/close part
has flexibility and, by being wound around the wiring material, the
open/close part is formed into the tubular shape together with the
halved part.
4. The grommet according to claim 1, wherein the open/close part
overlaps partially with the halved part in a radial direction of
the tubular part in a state where the open part is closed.
5. The grommet according to claim 2, wherein the open/close part
overlaps partially with the halved part in a radial direction of
the tubular part in a state where the open part is closed.
6. The grommet according to claim 3, wherein the open/close part
overlaps partially with the halved part in a radial direction of
the tubular part in a state where the open part is closed.
7. The grommet according to claim 1, wherein the open/close part is
one of open/close parts disposed on both sides of the halved part
in the circumferential direction, and the open/close parts disposed
on both sides of the halved part overlap with each other partially
in the radial direction of the tubular part in a state where the
open part is closed.
8. The grommet according to claim 1, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
9. The grommet according to claim 2, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
10. The grommet according to claim 3, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
11. The grommet according to claim 4, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
12. The grommet according to claim 5, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
13. The grommet according to claim 6, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
14. The grommet according to claim 7, wherein the tubular part
includes: a cylindrical part positioned between the main body part
and the halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part is provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
15. A wire harness comprising: a wiring material having
conductivity; and a grommet provided to the wiring material,
wherein the grommet includes: a main body part that is fitted to a
penetration hole penetrating an attachment target along an axial
direction, stops water at the penetration hole, and has the wiring
material inserted thereinto along the axial direction; and a
tubular part that is unified with the main body part so as to have
a tubular shape, and has the wiring material inserted thereinto
along the axial direction, and the tubular part includes: a halved
part that is formed to have a shape of a part of the tubular part
in a circumferential direction; an open part where an inside of the
tubular part is open at a position except a position where the
halved part is formed in the circumferential direction; and an
open/close part that is formed continuing from the halved part in
the circumferential direction and is able to open and close the
open part.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] The present application claims priority to and incorporates
by reference the entire contents of Japanese Patent Application No.
2019-035043 filed in Japan on Feb. 28, 2019.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0002] The present invention relates to a grommet and a wire
harness.
2. Description of the Related Art
[0003] One example of the conventionally known grommets to be
mounted in a vehicle is disclosed in Japanese Utility Model
Application Laid-open No. H5-83949. When a wire harness is inserted
into a penetration hole that is open through a vehicle body panel
of an automobile or the like, this grommet is disposed between the
panel and the wire harness so as to achieve sealing. This grommet
includes a panel engaging part, a tubular part for inserting the
wire harness, a cut part, an engaging concave part, and an engaging
convex part. The panel engaging part includes a large-diameter
flange that is engaged with an engaging hole of the panel. The
tubular part for inserting the wire harness protrudes from an outer
periphery of a central hole of the panel engaging part so as to be
integrally molded with the large-diameter flange. The cut part is
formed in a manner that the grommet is cut along an axial direction
from an end of the tubular part to an end of the panel engaging
part so that the grommet can be opened to both sides. The engaging
concave part and the engaging convex part are formed on opposite
surfaces of the cut part and can be engaged with each other when
the opposite surfaces are bonded together.
[0004] Here, the grommet is also disposed for the purpose of
stopping water from flowing from one space side to the other space
side, the spaces being sectioned by a vehicle body panel. In order
to efficiently stop water, it is necessary to extend a part that
covers the wire harness. However, if the part that covers the wire
harness is extended long, it becomes difficult to pass a leading
member through the grommet and the workability in assembling the
wire harness may deteriorate.
SUMMARY OF THE INVENTION
[0005] The present invention has been made in view of the above
circumstance, and an object is to provide a grommet and a wire
harness that can improve the water stopping performance while
suppressing the deterioration in workability in assembling the
grommet.
[0006] In order to solve the above mentioned problem and achieve
the object, a grommet according to one aspect of the present
invention includes a main body part that is fitted to a penetration
hole penetrating an attachment target along an axial direction,
stops water at the penetration hole, and has a wiring material
inserted thereinto along the axial direction; and a tubular part
that is unified with the main body part so as to have a tubular
shape, and has the wiring material inserted thereinto along the
axial direction, wherein the tubular part includes: a halved part
that is formed to have a shape of a part of the tubular part in a
circumferential direction; an open part where an inside of the
tubular part is open at a position except a position where the
halved part is formed in the circumferential direction; and an
open/close part that is formed continuing from the halved part in
the circumferential direction and is able to open and close the
open part.
[0007] According to another aspect of the present invention, in the
grommet, it is preferable that the open/close part is formed to
have a halved shape corresponding to the open part.
[0008] According to still another aspect of the present invention,
in the grommet, it is preferable that the open/close part has
flexibility and, by being wound around the wiring material, the
open/close part is formed into the tubular shape together with the
halved part.
[0009] According to still another aspect of the present invention,
in the grommet, it is preferable that the open/close part overlaps
partially with the halved part in a radial direction of the tubular
part in a state where the open part is closed.
[0010] According to still another aspect of the present invention,
in the grommet, it is preferable that the open/close part is one of
open/close parts disposed on both sides of the halved part in the
circumferential direction, and the open/close parts disposed on
both sides of the halved part may overlap with each other partially
in the radial direction of the tubular part in a state where the
open part is closed.
[0011] According to still another aspect of the present invention,
in the grommet, it is preferable that the tubular part includes: a
cylindrical part positioned between the main body part and the
halved part; a groove part formed along the circumferential
direction; and a convex part that is formed along the
circumferential direction and enters the groove part in the state
where the open part is closed by the open/close part, and the
groove part may be provided to one of the cylindrical part and the
open/close part and the convex part is provided to the other.
[0012] In order to achieve the above mentioned object and achieve
the object, according to still another aspect of the present
invention a wire harness includes a wiring material having
conductivity; and a grommet provided to the wiring material,
wherein the grommet includes: a main body part that is fitted to a
penetration hole penetrating an attachment target along an axial
direction, stops water at the penetration hole, and has the wiring
material inserted thereinto along the axial direction; and a
tubular part that is unified with the main body part so as to have
a tubular shape, and has the wiring material inserted thereinto
along the axial direction, and the tubular part includes: a halved
part that is formed to have a shape of a part of the tubular part
in a circumferential direction; an open part where an inside of the
tubular part is open at a position except a position where the
halved part is formed in the circumferential direction; and an
open/close part that is formed continuing from the halved part in
the circumferential direction and is able to open and close the
open part.
[0013] The above and other objects, features, advantages and
technical and industrial significance of this invention will be
better understood by reading the following detailed description of
presently preferred embodiments of the invention, when considered
in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a perspective view illustrating a schematic
structure of a wire harness in which a grommet according to a first
embodiment is used;
[0015] FIG. 2 is a perspective view illustrating the schematic
structure of the wire harness in which the grommet according to the
first embodiment is used;
[0016] FIG. 3 is a cross-sectional perspective view illustrating
the schematic structure of the wire harness in which the grommet
according to the first embodiment is used;
[0017] FIG. 4 is a perspective view illustrating a state in which
an open/close part of the grommet illustrated in FIG. 1 is
open;
[0018] FIG. 5 is an arrow view taken along A-A in FIG. 4;
[0019] FIG. 6 is an arrow view taken along B-B in FIG. 5;
[0020] FIG. 7 is a perspective view illustrating a grommet
according to a second embodiment;
[0021] FIG. 8 is a perspective view illustrating a state in which
an open/close part illustrated in FIG. 7 is open;
[0022] FIG. 9 is a perspective view illustrating the grommet
illustrated in FIG. 8 that is viewed from an open part side;
[0023] FIG. 10 is a perspective view illustrating a grommet
according to a third embodiment;
[0024] FIG. 11 is a perspective view illustrating a state in which
an open/close part illustrated in FIG. 10 is open;
[0025] FIG. 12 is a perspective view illustrating a state in which
the open/close part illustrated in FIG. 10 is open; and
[0026] FIG. 13 is a perspective view illustrating a state in which
the open/close part illustrated in FIG. 12 is closed.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0027] Embodiments of the present invention are hereinafter
described in detail with reference to the drawings. Note that the
present invention is not limited by these embodiments. The
components to be described in the embodiments below include the
component that can be replaced easily by a person skilled in the
art or that is substantially the same.
First Embodiment
[0028] A grommet 1 according to a first embodiment that is
illustrated in FIG. 1, FIG. 2, and FIG. 3 is incorporated in a wire
harness WH that is wired in a vehicle or the like. The wire harness
WH is formed in a manner that, for example, a plurality of wiring
materials W used in the connection between devices to be mounted in
the vehicle for power supply or signal communication are bundled
into an assembly, and the wiring materials W are connected to each
device with a connector or the like. The wire harness WH includes
the wiring material W that is conductive and the grommet 1 that is
provided to the wiring material W and has the wiring material W
inserted thereinto. The wire harness WH may further include various
components, for example, an exterior member such as a corrugate
tube, a resin tape, or a protector, an electrical connection box,
and a fixing tool. The wiring material W is formed of, for example
a metal bar, an electric wire, an electric wire bundle, or the
like. The metal bar is a conductive bar-like member externally
covered with an insulating covering part. The electric wire is a
conductor (core wire) formed of a plurality of conductive metal
strands that is externally covered with an insulating covering
part. The electric wire bundle is a bundle of the electric wires.
The wire harness WH bundles and unifies the wiring materials W and
electrically connects between the devices through connectors or the
like provided at terminals of the bundled wiring materials W.
[0029] When the wiring material W is wired across two spaces that
are sectioned with an attachment panel 100, which corresponds to an
attachment target, as a border through a penetration hole 101
provided to the attachment panel 100, the grommet 1 is used in the
penetration hole 101. The attachment panel 100 is, for example, a
metal plate that forms a body of the vehicle, and the penetration
hole 101 penetrates the attachment panel 100 along a plate
thickness direction. The two spaces that are sectioned with the
attachment panel 100 as the border are typically a space in the
vehicle (for example, cabin) and a space outside the vehicle (for
example, engine compartment). The grommet 1 is assembled to the
penetration hole 101 in a state where the wiring material W of the
wire harness WH is inserted into the grommet 1 and the grommet 1 is
externally attached to the wiring material W; thus, the grommet 1
protects the wiring material W that passes the penetration hole 101
and stops water (is waterproof) at the penetration hole 101. The
grommet 1 also has functions of preventing dust and blocking noise
in addition to the waterproof function for the penetration hole
101, for example. The structure of the grommet 1 is described in
detail with reference to each drawing.
[0030] Note that the attachment panel 100 is roughly drawn with a
two-dot chain line in FIG. 1, FIG. 2, and FIG. 3, and not drawn in
the other drawings. In addition, in each drawing, the wiring
material W and the attachment panel 100 are each drawn roughly with
a two-dot chain line. Among a first direction, a second direction,
and a third direction that are orthogonal to each other in the
description below, the first direction is referred to as "axial
direction X", the second direction is referred to as "width
direction Y", and the third direction is referred to as "height
direction Z". The axial direction X, the width direction Y, and the
height direction Z are typically orthogonal to each other. Here,
the axial direction X corresponds to the plate thickness direction
of the attachment panel 100 described above, and also corresponds
to the direction where the wiring material W and the grommet 1 are
inserted into the penetration hole 101. In other words, the axial
direction X is the direction along the direction where the wiring
material W inserted into the grommet 1 is extended, and the
penetration hole 101 of the attachment panel 100 penetrates the
attachment panel 100 along the axial direction X. The width
direction Y and the height direction Z correspond to the direction
where the attachment panel 100 is extended. In the description
here, the wiring material W is wired linearly along the axial
direction X for the convenience in order to help understanding;
however, the structure is not limited thereto. In another example,
in a state where the grommet 1 is attached to the attachment panel
100, the axial direction X may be a bent direction and the grommet
1 and the wiring material W may be bent partially. The directions
to be described below correspond to the directions in the state
where the grommet 1 is assembled to the attachment panel 100 unless
otherwise stated.
[0031] Specifically, the grommet 1 according to the first
embodiment is a sealing member that has the wiring material W
inserted inside along the axial direction X and can stop water at
the penetration hole 101 in the attachment panel 100 as illustrated
in FIG. 1, FIG. 2, and FIG. 3. The grommet 1 includes a main body
part 10, a tubular part 20, and a tubular part 30, and is formed as
an elastic body in which these parts are unified. The grommet 1 is
formed of, for example, an insulating elastic resin material that
has low rigidity and high flexibility, such as rubber or
thermoplastic elastomer (for example, ethylene-propylene-diene
rubber (EPDM)).
[0032] The main body part 10 is a part that is fitted to the
penetration hole 101, stops water at the penetration hole 101, and
has the wiring material W inserted thereinto along the axial
direction X. The main body part 10 includes a first expansion part
11, a second expansion part 12, a fitting groove part 13, and a lip
part 14.
[0033] The first expansion part 11 and the second expansion part 12
are each formed to have an annular shape, here a tubular shape,
with a central axial line C thereof extended along the axial
direction X. The first expansion part 11 and the second expansion
part 12 face each other with a space therebetween along the axial
direction X and are unified at an outer peripheral part 10A. Here,
the outer peripheral part 10A is a part that connects to both the
first expansion part 11 and the second expansion part 12 at a
position near each outer end in a radial direction (direction
orthogonal to the central axial line C).
[0034] The first expansion part 11 and the second expansion part 12
are each formed to have a shape that expands outward along the
axial direction X. The first expansion part 11 and the second
expansion part 12 are each formed to have a hollow dome shape as a
whole while being unified at the outer peripheral part 10A. The
first expansion part 11 is connected to the tubular part 20 on a
surface of the first expansion part 11 that is opposite to a
surface thereof on the second expansion part 12 side in the axial
direction X. The second expansion part 12 is connected to the
tubular part 30 on a surface of the second expansion part 12 that
is opposite to a surface thereof on the first expansion part 11
side in the axial direction X.
[0035] The fitting groove part 13 is a groove that is provided to
the outer peripheral part 10A where the first expansion part 11 and
the second expansion part 12 are unified. The fitting groove part
13 is formed in the outer peripheral part 10A as an annular groove
part with the central axial line C as a center. With the main body
part 10 fitted to the penetration hole 101, an end part of the
attachment panel 100 that forms the penetration hole 101 is fitted
to the fitting groove part 13.
[0036] The lip part 14 is a water stopping part with a pleated
shape that is formed along the fitting groove part 13. Here, the
lip part 14 is formed to have an annular shape along the fitting
groove part 13 at an end part of the fitting groove part 13 on the
first expansion part 11 side. That is to say, the lip part 14 is
provided to the fitting groove part 13 and has an annular shape
with the central axial line C as the center. While the end part of
the penetration hole 101 is fitted to the fitting groove part 13,
the lip part 14 is in contact with the surface of the end part
(here, the surface on the first expansion part 11 side) and stops
water at the surface. The lip part 14 is in close contact with the
surface of the end part that forms the penetration hole 101 by the
elastic deformation, and seals the entire periphery of the
penetration hole 101.
[0037] The tubular parts 20 and 30 are the parts that are unified
with the main body part 10, are formed to have the tubular shape,
and have the wiring material W inserted thereinto along the axial
direction X.
[0038] The tubular part 20 is formed to protrude from the first
expansion part 11 to one side (opposite to the second expansion
part 12 side) along the axial direction X. The tubular part 20 is
formed to have a cylindrical shape with the central axial line C as
the center and is extended along the axial direction X. The tubular
part 20 is formed to have a cylindrical shape with the diameter
smaller than that of a large part of the first expansion part 11.
The tubular part 20 has one end part in the axial direction X open
and the other end connected to the first expansion part 11. The
tubular part 20 is connected at an approximately central position
of the first expansion part 11 with respect to the width direction
Y and the height direction Z. The tubular part 20 includes a
bellows part 21. The bellows part 21 is formed in a manner that a
part of the tubular part 20 in the axial direction X is formed in
the bellows shape. That is to say, the bellows part 21 is formed in
a manner that a part of the tubular part 20 in the axial direction
X alternately becomes a large-diameter part and a small-diameter
part toward one direction of the axial direction X. By having the
bellows part 21, the tubular part 20 can bend easily at the
position of the bellows part 21. Note that the structure of this
tubular part 20 is described in detail below.
[0039] The tubular part 30 is formed to protrude from the second
expansion part 12 to one side (opposite to the first expansion part
11 side) along the axial direction X. The tubular part 30 is formed
to have a cylindrical shape with the central axial line C as the
center and is extended along the axial direction X. The tubular
part 30 is formed to have a cylindrical shape with the diameter
smaller than that of a large part of the second expansion part 12.
The tubular part 30 has one end part in the axial direction X open
and the other end connected to the second expansion part 12. The
tubular part 30 is connected at an approximately central position
of the second expansion part 12 with respect to the width direction
Y and the height direction Z.
[0040] In the grommet 1 with the above structure, an internal space
part formed by the main body part 10, the tubular part 20, and the
tubular part 30 functions as an insertion space part 40. The
insertion space part 40 is a space part where the wiring material W
is inserted, and continues along the tubular part 20, the main body
part 10, and the tubular part 30 along the axial direction X. In
the grommet 1, the wiring material W is inserted along the axial
direction X into the insertion space part 40 that is formed to
communicate with the tubular part 20, the main body part 10, and
the tubular part 30.
[0041] The grommet 1 is attached to the wiring material W in a
manner that the wiring material W is inserted into the insertion
space part 40, and then, together with the terminal of the wiring
material W, the tubular part 20 or the tubular part 30 is inserted
into the penetration hole 101. Then, as the main body part 10 is
fitted to the penetration hole 101 so that the end part of the
penetration hole 101 is fitted to the fitting groove part 13 of the
main body part 10, the grommet 1 is assembled to the attachment
panel 100. When the grommet 1 is in this state, the lip part 14 is
in close contact with the surface of the periphery of the
penetration hole 101 while the lip part 14 is elastically deformed,
and thus, the entire periphery of the penetration hole 101 is
sealed. The grommet 1 may stop water at the opening of the tubular
parts 20 and 30 in a manner that a winding tape or the like is
wound along the wiring material W inserted into the insertion space
part 40, the tubular parts 20 and 30, and the wiring material
W.
[0042] Next, the tubular part 20 is described in detail. The
tubular part 20 includes a halved part 50, an open part 51, and an
open/close part 60. FIG. 4 is a perspective view illustrating a
state in which the open/close part 60 of the grommet 1 illustrated
in FIG. 1 is open. FIG. 5 is an arrow view taken along A-A in FIG.
4. FIG. 6 is an arrow view taken along B-B in FIG. 5. The halved
part 50 is a part that forms a predetermined range of the tubular
part 20 in a circumferential direction with the central axial line
C as the center. In the first embodiment, the halved part 50 is a
part that forms the range of about 180.degree. of the tubular part
20 in the circumferential direction with the central axial line C
as the center, and is formed to have an approximately
semi-cylindrical shape. At a position of the tubular part 20
including the halved part 50 except the position where the halved
part 50 is formed in the circumferential direction with the central
axial line C as the center, the open part 51 where the inside of
the tubular part 20 is open is formed.
[0043] In addition, the open/close part 60 is formed continuously
from the halved part 50 in the circumferential direction of the
tubular part 20 with the central axial line C as the center, and is
able to open and close the open part 51. Specifically, the
open/close part 60 is formed to have an approximately
semi-cylindrical shape like the halved part 50, that is, the
open/close part 60 is formed to have a halved shape corresponding
to the open part 51. The open/close part 60 has one end in the
circumferential direction connected to one end of the halved part
50 in the circumferential direction. That is to say, the open/close
part 60 is disposed at one end side of the halved part 50 in the
circumferential direction of the tubular part 20. A connection part
61 corresponding to a part of the open/close part 60 that is
connected to the halved part 50 is extended along the axial
direction X, and the open/close part 60 is rotatable with the
connection part 61 as the center.
[0044] The halved part 50 and the open/close part 60 are formed
apart by a predetermined length from the position where the tubular
part 20 is connected to the first expansion part 11 to a direction
away from the first expansion part 11 along the axial direction X.
That is to say, the tubular part 20 includes a cylindrical part 22
that is formed to have an approximately cylindrical shape with the
central axial line C as the center at the position between the main
body part 10 and the halved part 50, and the halved part 50 is
formed on the side opposite to the side where the cylindrical part
22 is connected to the main body part 10 in the axial direction X.
The position of a part of the open/close part 60 that is close to
the cylindrical part 22 in the axial direction X includes the range
where the cylindrical part 22 is formed.
[0045] The tubular part 20 moreover includes a groove part 55 that
is formed along the circumferential direction of the tubular part
20 with the central axial line C as the center, and a convex part
56 that enters the groove part 55 with the open part 51 closed by
the open/close part 60. The groove part 55 is formed on the outer
peripheral surface side at the position of the cylindrical part 22
that is close to the open part 51 in the axial direction X, that
is, the groove part 55 is formed in the part of the cylindrical
part 22 where the cylindrical part 22 overlaps with the open/close
part 60 in the axial direction X. Note that the convex part 56 is
formed on the inner peripheral surface side at the position of the
open/close part 60 that is close to the cylindrical part 22 in the
axial direction X, that is, the convex part 56 is formed in the
part of the open/close part 60 where the open/close part 60
overlaps with the cylindrical part 22 in the axial direction X.
Therefore, the convex part 56 can enter the groove part 55 with the
open part 51 closed by the open/close part 60.
[0046] When the wiring material W is inserted into the grommet 1
with the aforementioned structure, the wiring material W is
inserted, with the open part 51 opened by the open/close part 60.
Specifically, before the wiring material W is inserted into the
grommet 1, a tool (not shown) that can increase the size of the
insertion space part 40 is inserted into the insertion space part
40. After the size of the insertion space part 40 in a
predetermined direction that intersects the axial direction X is
increased, the wiring material W is inserted.
[0047] In this case, by keeping the open/close part 60 open, the
grommet 1 can shorten the length of the part that is tubular in the
axial direction X. That is to say, by keeping the open/close part
60 open, the grommet 1 does not become tubular in the range where
the halved part 50 is formed in the axial direction X; therefore,
the part that is tubular can be shortened. Accordingly, the tool
can be inserted more easily and with this tool, the size of the
insertion space part 40 in the predetermined direction can be
increased easily. With the size of the insertion space part 40 of
the grommet 1 increased by the tool, the wiring material W is
inserted into the insertion space part 40.
[0048] After the wiring material W is inserted into the insertion
space part 40 of the grommet 1, the open/close part 60 is rotated
using the connection part 61 as the center, so that the open/close
part 60 makes the open part 51 closed (see FIG. 1, FIG. 2, and FIG.
3). Thus, the part of the grommet 1 that is tubular becomes long in
the axial direction X; therefore, the wiring material W can be
covered with the large length and the wider range of the wiring
material W can be covered with the grommet 1.
[0049] In the state where the open part 51 is closed by the
open/close part 60, a part of the open/close part 60 and a part of
the halved part 50 overlap with each other in the radial direction
of the tubular part 20. That is to say, while the open part 51 is
closed, an end part 52 of the halved part 50 and an end part 62 of
the open/close part 60, the end parts being positioned opposite to
the end parts where the connection part 61 is disposed in the
circumferential direction with the central axial line C as the
center, are overlapped with each other in the radial direction of
the tubular part 20. The open/close part 60 closes the open part 51
with the part of the open/close part 60 and the part of the halved
part 50 overlapped.
[0050] Moreover, when the open part 51 is closed by the open/close
part 60, a part of the open/close part 60 that is close to the
cylindrical part 22 covers the cylindrical part 22 from the outside
in the radial direction. In this case, the convex part 56 of the
open/close part 60 enters the groove part 55 provided to the
cylindrical part 22. That is to say, the open/close part 60 closes
the open part 51 as the convex part 56 is guided into the groove
part 55.
[0051] After the open part 51 is closed by the open/close part 60
to cover the wiring material W with the halved part 50 and the
open/close part 60, an adhesive tape is continuously wound from
outside the tubular part 20 and the wiring material W. Thus, the
tubular part 20 and the wiring material W are unified.
[0052] In the grommet 1 and the wire harness WH according to the
first embodiment described above, the tubular part 20 of the
grommet 1 includes the halved part 50, the open part 51, and the
open/close part 60. Therefore, by keeping the open part 51 open by
the open/close part 60 when the grommet 1 is attached to the wiring
material W, the grommet 1 can be attached while the part of the
tubular part 20 that is tubular is shortened. Thus, the attachment
is facilitated. As a result, the workability in attaching the
grommet 1 can be improved.
[0053] In addition, by closing the open part 51 with the open/close
part 60 after the grommet 1 is attached to the wiring material W in
a manner that the wiring material W is inserted into the grommet 1,
the part that is tubular in the tubular part 20 can be extended.
Thus, when the grommet 1 or the wire harness WH is used, the wiring
material W can be covered in the state where the part that is
tubular in the tubular part 20 is extended long. Accordingly, the
grommet 1 can prevent the water from entering the insertion space
part 40 more certainly. As a result, the water stopping performance
can be improved while the deterioration in workability in
assembling the grommet 1 is suppressed.
[0054] In addition, since the open/close part 60 is formed to have
the halved shape in accordance with the open part 51, the open part
51 can be easily and certainly opened and closed. As a result, the
water stopping performance can be improved while the deterioration
in workability in assembling the grommet 1 is suppressed more
certainly.
[0055] In the state where the open part 51 is closed by the
open/close part 60, the part of the open/close part 60 and the part
of the halved part 50 overlap with each other in the radial
direction of the tubular part 20. Therefore, the water entry into
the insertion space part 40 from the outside of the tubular part 20
through a surface common to the halved part 50 and the open/close
part 60 can be suppressed. As a result, the water stopping
performance can be improved more certainly.
[0056] When the open part 51 is closed by the open/close part 60,
the convex part 56 provided to the open/close part 60 enters the
groove part 55 provided to the cylindrical part 22. Therefore, even
if water enters the insertion space part 40, the water does not
easily go to the axial direction X over the position where the
convex part 56 is formed. As a result, the water stopping
performance can be improved more certainly.
Second Embodiment
[0057] The grommet 1 according to a second embodiment has a
structure similar to that of the grommet 1 according to the first
embodiment except that the open/close part 60 has flexibility.
Since the other structure is similar to that of the first
embodiment, the description of the similar structure is omitted and
the same component is denoted by the same reference symbol.
[0058] FIG. 7 is a perspective view of the grommet 1 according to
the second embodiment. The grommet 1 according to the second
embodiment includes the main body part 10 and the tubular part 20,
and the tubular part 20 includes the halved part 50, the open part
51, and the open/close part 60, which is similar to the structure
of the grommet 1 according to the first embodiment. Among these
components, the open/close part 60 is disposed on each of both
sides of the halved part 50 in the circumferential direction of the
tubular part 20.
[0059] FIG. 8 is a perspective view in which the open/close part 60
in FIG. 7 is open. FIG. 9 is a perspective view of the grommet 1 in
FIG. 8 that is viewed from the open part 51 side. The grommet 1
according to the second embodiment is different from that of the
first embodiment in that the open/close part 60 is formed to have a
plate shape and has flexibility. Therefore, when the open part 51
is opened by the open/close part 60, the open/close part 60 is
formed to have the plate shape continuously from the halved part 50
on each side of the halved part 50 in the circumferential direction
of the tubular part 20. The position of a part of the open/close
part 60 that is close to the cylindrical part 22 in the axial
direction X includes the range where the cylindrical part 22 is
formed.
[0060] In addition, the convex part 56 is formed at each of the
open/close parts 60 at two positions that are close to the
cylindrical part 22 in the axial direction X. The cylindrical part
22 includes the groove part 55. The groove part 55 is formed on the
outer peripheral surface side of the cylindrical part 22 at the
position that is close to the open part 51 in the axial direction X
along the circumferential direction of the tubular part 20 with the
central axial line C as the center. Note that the convex part 56 of
the open/close part 60 is provided on the inner peripheral surface
side that is formed when the open/close part 60 is closed, and is
formed in the part where the open/close part 60 overlaps with the
cylindrical part 22 in the axial direction X. Therefore, the convex
part 56 of the open/close part 60 can enter the groove part 55 with
the open part 51 closed by the open/close part 60.
[0061] In the second embodiment, when the wiring material W is
inserted into the grommet 1, the wiring material W is inserted,
with the open part 51 opened by the open/close part 60. Thus, the
length of the part of the tubular part 20 that is tubular in the
axial direction X can be shortened. Accordingly, the tool that is
used to insert the wiring material W into the grommet 1 can be
inserted more easily into the insertion space part 40, and with
this tool, the size of the insertion space part 40 in the
predetermined direction can be increased easily. After the size of
the insertion space part 40 of the grommet 1 is increased by the
tool, the wiring material W is inserted into the insertion space
part 40.
[0062] After the wiring material W is inserted into the insertion
space part 40 of the grommet 1, the open part 51 is closed by the
open/close part 60 (see FIG. 7). In the second embodiment, when the
open part 51 is closed by the open/close part 60, both the
open/close parts 60 with flexibility at the two positions are bent
along the circumferential direction of the tubular part 20 and
wound around the wiring material W. Thus, the open/close parts 60
and the halved part 50 are formed into the tubular shape together
and the open part 51 is closed by the open/close part 60.
Therefore, since the part of the grommet 1 that is tubular in the
axial direction X becomes long, the wiring material W can be
covered with the large length and thus, a wider area of the wiring
material W can be covered with the grommet 1.
[0063] While the open part 51 is closed, the open/close parts 60
disposed on both sides of the halved part 50 overlap with each
other partially in the radial direction of the tubular part 20.
That is to say, in the state where the open part 51 is closed, the
end parts 62 of the open/close parts 60 disposed on both sides of
the halved part 50, the end parts being positioned opposite to the
end parts that are connected to the halved part 50 in the
circumferential direction with the central axial line C as the
center, are overlapped with each other in the radial direction of
the tubular part 20. The open/close part 60 closes the open part 51
with the parts of the open/close parts 60 at the two positions
overlapped with each other.
[0064] In addition, when the open part 51 is closed by the
open/close part 60, a part of the open/close parts 60 at the two
positions that is close to the cylindrical part 22 covers the
cylindrical part 22 from the outside in the radial direction. In
this case, the convex part 56 of the open/close part 60 enters the
groove part 55 provided to the cylindrical part 22. That is to say,
the open/close parts 60 at the two positions close the open part 51
with their convex parts 56 entering the groove part 55.
[0065] After the open part 51 is closed by the open/close part 60
to cover the wiring material W with the halved part 50 and the
open/close parts 60, an adhesive tape is continuously wound from
outside the tubular part 20 and the wiring material W. Thus, the
tubular part 20 and the wiring material W are unified.
[0066] In the grommet 1 and the wire harness WH according to the
second embodiment described above, the open/close part 60 is
flexible and by the winding around the wiring material W, the
open/close part 60 and the halved part 50 are formed into the
tubular shape together. Thus, the open/close part 60 can be brought
into close contact with the wiring material W. Thus, water entry
between the open/close part 60 and the wiring material W can be
suppressed more easily. As a result, the water stopping performance
can be improved while the deterioration in workability in
assembling the grommet 1 is suppressed more certainly.
[0067] In the state where the open part 51 is closed by the
open/close parts 60 at the two positions on both sides of the
halved part 50, the open/close parts 60 partially overlap with each
other in the radial direction of the tubular part 20. Therefore,
the water entry into the insertion space part 40 from the outside
of the tubular part 20 through a surface common to the open/close
parts 60 can be suppressed. As a result, the water stopping
performance can be improved more certainly.
Third Embodiment
[0068] The grommet 1 according to a third embodiment has a
structure similar to that of the grommet 1 according to the second
embodiment except that the open/close part 60 is provided at one
position. Since the other structure is similar to that of the
second embodiment, the description of the similar structure is
omitted and the same component is denoted by the same reference
symbol.
[0069] FIG. 10 is a perspective view of the grommet 1 according to
the third embodiment. In a manner similar to the structure of the
grommet 1 according to the second embodiment, the grommet 1
according to the third embodiment includes the main body part 10
and the tubular part 20, and the tubular part 20 includes the
halved part 50, the open part 51, and the open/close part 60 with
flexibility. Among these components, the open/close part 60 is
disposed only on one end side of the halved part 50 in the
circumferential direction of the tubular part 20, and when the open
part 51 is closed, the open/close part 60 is disposed on the
outside in the radial direction of the halved part 50 with the
large overlapping amount in the circumferential direction.
Specifically, the open/close part 60 overlaps with the halved part
50 by 90.degree. or more to the outside of the halved part 50 in
the circumferential direction with the central axial line C as the
center. That is to say, the open/close part 60 overlaps with the
halved part 50 in a manner that the position of the end part 62 in
a direction corresponding to the circumferential direction and the
position of the end part 52 of the halved part 50 in the
circumferential direction are separated by 90.degree. or more in
the circumferential direction with the central axial line C as the
center.
[0070] FIG. 11 and FIG. 12 are perspective views in which the
open/close part 60 in FIG. 10 is open. In the grommet 1 according
to the third embodiment, the open/close part 60 is formed to have
the plate shape with the flexibility, which is similar to the
structure according to the second embodiment. The different point
from the second embodiment is that the open/close part 60 is
positioned only on one end side of the halved part 50 in the
circumferential direction of the tubular part 20 and therefore, the
open/close part 60 in the circumferential direction of the tubular
part 20 is longer than the open/close part 60 according to the
second embodiment. In addition, in the third embodiment, the
open/close part 60 overlaps with the halved part 50 by more than or
equal to 90.degree.; therefore, the length of the open/close part
60 in the circumferential direction of the tubular part 20 is the
length corresponding to the length of 270.degree. or more in the
circumferential direction of the tubular part 20.
[0071] The groove part 55 provided to the cylindrical part 22
becomes longer as the open/close part 60 overlaps more with the
halved part 50, and the groove part 55 is formed along
substantially the entire circumference of the cylindrical part
22.
[0072] In the third embodiment, when the wiring material W is
inserted into the grommet 1, the wiring material W is inserted,
with the open part 51 opened by the open/close part 60. Thus, the
part of the tubular part 20 that is tubular can be shortened in the
axial direction X, and the wiring material W can be inserted more
easily.
[0073] After the wiring material W is inserted into the insertion
space part 40 of the grommet 1, the open part 51 is closed by the
open/close part 60. FIG. 13 is a perspective view in which the
open/close part 60 illustrated in FIG. 12 is closed. In the third
embodiment, when the open part 51 is closed by the open/close part
60, the open/close part 60 with flexibility is bent along the
circumferential direction of the tubular part 20 and wound around
the wiring material W. Thus, the open/close part 60 and the halved
part 50 are formed into the tubular shape together and the open
part 51 is closed by the open/close part 60. Therefore, since the
part of the grommet 1 that is tubular in the axial direction X
becomes long, the wiring material W can be covered with the large
length and thus, a wider area of the wiring material W can be
covered with the grommet 1.
[0074] When the open/close part 60 is closed, not just the open
part 51 is closed but also the open part 51 is overlapped with the
halved part 50 on the outside in the radial direction of the halved
part 50. Here, since the open part 51 is overlapped with the halved
part 50 by 90.degree. or more, a large part of the halved part 50
can be covered from the outside of the halved part 50.
[0075] In addition, when the open part 51 is closed by the
open/close part 60, the convex part 56 of the open/close part 60
enters the groove part 55 in the cylindrical part 22. In this case,
the convex part 56 also enters the groove part 55 by 90.degree. or
more in the circumferential direction with the central axial line C
as the center.
[0076] After the open part 51 is closed by the open/close part 60
to cover the wiring material W with the halved part 50 and the
open/close part 60, an adhesive tape is continuously wound from
outside the tubular part 20 and the wiring material W. Thus, the
tubular part 20 and the wiring material W are unified.
[0077] In the grommet 1 and the wire harness WH according to the
third embodiment described above, one open/close part 60 with
flexibility is provided. Therefore, by winding one open/close part
60 around the wiring material W, the open/close part 60 and the
halved part 50 are formed into the tubular shape together. Thus,
the open/close part 60 can be brought into close contact with the
wiring material W. Thus, the water entry between the open/close
part 60 and the wiring material W can be suppressed more easily. As
a result, the water stopping performance can be improved while the
deterioration in workability in assembling the grommet 1 is
suppressed more certainly.
[0078] Moreover, the open/close part 60 overlaps in large amount
with the halved part 50 when the open part 51 is closed, and in the
third embodiment, the open/close part 60 overlaps by 90.degree. or
more in the circumferential direction. Thus, the range where the
halved part 50 and the open/close part 60 are in close contact can
be increased. Therefore, the water entry into the insertion space
part 40 from the outside of the tubular part 20 through a surface
common to the halved part 50 and the open/close part 60 can be
suppressed. As a result, the water stopping performance can be
improved more certainly.
[0079] In the first to the third embodiments described above, the
groove part 55 is provided to the cylindrical part 22, and the
convex part 56 is provided to the open/close part 60; however, the
positions of the groove part 55 and the convex part 56 may be
opposite. That is to say, the groove part 55 may be provided to the
open/close part 60, and the convex part 56 may be provided to the
cylindrical part 22. It is only necessary that the groove part 55
is provided to one of the cylindrical part 22 and the open/close
part 60, and the convex part 56 is provided to the other.
[0080] In a reference example, the member that covers the wiring
material W, such as a tube or a boot, may be a structure including
the halved part 50 and the open/close part 60 as typified by the
tubular part 20 in the grommet 1 according to the first to the
third embodiments.
[0081] The grommet and the wire harness according to the
embodiments of the present invention described above are not
limited to the aforementioned embodiments and various changes are
possible in the scope of claims.
[0082] The grommet and the wire harness according to the
embodiments of the present invention may have a combination of the
components described in the embodiments and modifications.
[0083] The grommet and the wire harness according to the present
embodiments include the main body part and the tubular part. The
tubular part includes the halved part that is formed to have the
shape of a part of the tubular part in the circumferential
direction, the open part where the inside of the tubular part is
open at the position except the position where the halved part is
formed in the circumferential direction, and the open/close part
that is formed continuing from the halved part and is able to open
and close the open part. Thus, by keeping the open/close part open
when the grommet is attached to the wiring material, the grommet
can be attached in the state where the part that is tubular in the
tubular part is shortened. Thus, the attachment is facilitated.
After the grommet is attached to the wiring material, the
open/close part is closed, so that the wiring material can be
covered in the state where the part of the tubular part that is
tubular is extended long; thus, the water stopping performance can
be improved. As a result, the effect of the waterproof performance
can be improved while the deterioration in workability in
assembling the grommet is suppressed.
[0084] Although the invention has been described with respect to
specific embodiments for a complete and clear disclosure, the
appended claims are not to be thus limited but are to be construed
as embodying all modifications and alternative constructions that
may occur to one skilled in the art that fairly fall within the
basic teaching herein set forth.
* * * * *